ana is substituted for the id of idam in the Instrumental -3rd case singular and the cases that follow, provided that the augment akac is not added.,
As अनेन, अनयोः ॥ Why do we say
ot when क is added by 5.3.71\?
Observe इमकेन, इमकयोः ॥ The word आप् (आपि) in the sutra is a pratyahara, formed with the आ of टा (Instrumental Singular), and प् of सुप् (Locative Plural).,